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A322159 Decimal expansion of 1 - 1/sqrt(5). 0
5, 5, 2, 7, 8, 6, 4, 0, 4, 5, 0, 0, 0, 4, 2, 0, 6, 0, 7, 1, 8, 1, 6, 5, 2, 6, 6, 2, 5, 3, 7, 4, 4, 7, 5, 2, 9, 1, 1, 8, 7, 6, 3, 2, 8, 0, 7, 7, 6, 9, 4, 8, 5, 5, 1, 4, 5, 8, 2, 0, 5, 5, 0, 9, 1, 7, 8, 9, 5, 8, 1, 4, 8, 7, 2, 4, 3, 9, 0, 2, 0, 1, 1, 7, 1, 1, 7, 1, 1, 8, 3, 2, 4, 2, 4, 3, 5, 4, 5, 0, 0, 6 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Continued fraction: [0;1,1,4,4,4...].

Least root of the polynomial: 5x^2 - 10x + 4.

LINKS

Table of n, a(n) for n=0..101.

FORMULA

Equals 1 - 1/A002163.

Equals 1/(1 - cos(4*Pi/5)) = (1/2)*csc(2*Pi/5)^2.

Also equal to 2/(phi*sqrt(5)) = 2/(A001622*A002163).

Equals 1 - A020762. - Andrew Howroyd, Nov 30 2018

EXAMPLE

0.552786404500042060718165266253744752911876328077...

MAPLE

evalf[110](1-1/sqrt(5)); # Muniru A Asiru, Dec 01 2018

MATHEMATICA

RealDigits[1-1/Sqrt[5], 10, 100][[1]] (* Amiram Eldar, Nov 29 2018 *)

CROSSREFS

Cf. A002163, A001622, A020762.

Sequence in context: A316168 A019602 A153839 * A023580 A021648 A287746

Adjacent sequences:  A322156 A322157 A322158 * A322160 A322161 A322162

KEYWORD

cons,easy,nonn

AUTHOR

Tristan Cam, Nov 29 2018

STATUS

approved

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Last modified June 16 14:16 EDT 2021. Contains 345057 sequences. (Running on oeis4.)